Cement Types, Composition, Uses and Advantages of Nanocement, Environmental Impact on Cement Production, and Possible Solutions

Table 2

Composition of components as wt.% used to make different types of cements.

Component	Portland cement	Siliceous fly ash	Calcareous cement	Slag cement	Fume silica
SiO2	21.9	52.0	35.0	35.0	85–97
Al2O3	6.9	23.0	18.0	12.0	0
Fe2O3	3.9	11.0	6.0	1.0	0
CaO	63.0	5.0	21.0	40.0	<1
MgO	2.5	0	0	0	0
SO3	1.7	0	0	0	0
SSA (m^2·g^−1)	0.37 Blaine	0.42 Blaine	0.42 Blaine	0.40 Blaine	15–30 BET
SG	3.15	2.38	2.65	2.94	2.22

SSA = specific surface area; SG = specific gravity. Adapted from [13–15].